import java.util.*;
public class Main {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        while (in.hasNextInt()) { 
            int n = in.nextInt();
            int count = 0;
            for(int i = 2; i <= Math.sqrt(n); i++){
                if(n % i == 0){
                    while(n % i == 0){
                        n = n / i;
                    }
                    count++;
                }
            }
            if(n != 1) count++;
            System.out.println(count);
        }
    }
}